Electronics and Communication Engineering - Electronic Devices and Circuits
Exercise :: Electronic Devices and Circuits - Section 16
| 1. |
Voltage series feedback (Also called series-shunt feedback) results in |
| A. |
increase in both I/P and O/P impedances | | B. |
decrease in both I/P and O/P impedances | | C. |
increase in I/P impedance and decrease in O/P impedance | | D. |
decrease in I/P impedance and increase in O/P impedance |
Answer: Option C
Explanation:
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| 2. |
How many free electrons does a p type semiconductor has? |
| A. |
only those produced by thermal energy | | B. |
only those produced by doping | | C. |
those produced by doping as well as thermal energy | | D. |
any of the above |
Answer: Option A
Explanation:
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| 3. |
Which of the following has highest resistivity? |
| A. |
Mica | | B. |
Paraffin wax | | C. |
Air | | D. |
Mineral oil |
Answer: Option C
Explanation:
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| 4. |
Assertion (A): In p-n-p transistor collector current is termed negative.
Reason (R): In p-n-p transistor holes are majority carriers.
|
| A. |
Both A and R are true and R is correct explanation of A | | B. |
Both A and R are true but R is not a correct explanation of A | | C. |
A is true but R is false | | D. |
A is false but R is true |
Answer: Option B
Explanation:
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| 5. |
The sensitivity of human eyes is maximum at |
| A. |
white portion of spectrum | | B. |
green portion of spectrum | | C. |
red portion of spectrum | | D. |
violet portion of spectrum |
Answer: Option B
Explanation:
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